IBM on Wednesday unveiled a new category of server designed specifically for cloud computing and Web 2.0 applications. The iDataPlex system builds upon IBM's blade server background and more than doubles the number of systems that can run in a single IBM rack. It also uses 40 percent less power while quintupling the amount of computing that can be done. The iDataPlex can be outfitted with a liquid-cooled wall to eliminate the need for air conditioning, and it uses industry-standard components including Linux and cluster-management technology xCat to reduce its cost.